[ObjC ARC] Converts crw_web_controller to ARC.

ios/web/web_state/ui/crw_web_controller_container_view.mm

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/web/web_state/ui/crw_web_controller_container_view.h"
 
 #include "base/ios/weak_nsobject.h"
 #include "base/logging.h"
 #include "base/mac/scoped_nsobject.h"
 #import "ios/web/public/web_state/ui/crw_content_view.h"
@@ skipping 134 matching lines @@
   return nil;
 }
 
 - (void)dealloc {
   self.contentViewProxy.contentView = nil;
   [super dealloc];
 }
 
 #pragma mark Accessors
 
+- (id<CRWWebControllerContainerViewDelegate>)delegate {
+  return _delegate.get();
+}
+
+- (void)setDelegate:(id<CRWWebControllerContainerViewDelegate>)delegate {
+  _delegate.reset(delegate);
+}
+
 - (CRWWebViewContentView*)webViewContentView {
   return _webViewContentView.get();
 }
 
 - (void)setWebViewContentView:(CRWWebViewContentView*)webViewContentView {
   if (![_webViewContentView isEqual:webViewContentView]) {
     [_webViewContentView removeFromSuperview];
     _webViewContentView.reset([webViewContentView retain]);
     [_webViewContentView setFrame:self.bounds];
     [self addSubview:_webViewContentView];
@@ skipping 162 matching lines @@
   else
     self.toolbarContainerView = nil;
 }
 
 - (void)removeAllToolbars {
   // Resetting the property will remove the toolbars from the hierarchy.
   self.toolbarContainerView = nil;
 }
 
 @end